diff --git a/libcutils/fs_config.cpp b/libcutils/fs_config.cpp
index 2b3443f..919b65b 100644
--- a/libcutils/fs_config.cpp
+++ b/libcutils/fs_config.cpp
@@ -139,14 +139,8 @@
     { 00600, AID_ROOT,      AID_ROOT,      0, "odm/default.prop" },
     { 00444, AID_ROOT,      AID_ROOT,      0, odm_conf_dir + 1 },
     { 00444, AID_ROOT,      AID_ROOT,      0, odm_conf_file + 1 },
-    { 00600, AID_ROOT,      AID_ROOT,      0, "system/odm/build.prop" },
-    { 00600, AID_ROOT,      AID_ROOT,      0, "system/odm/default.prop" },
-    { 00444, AID_ROOT,      AID_ROOT,      0, "system/odm/etc/fs_config_dirs" },
-    { 00444, AID_ROOT,      AID_ROOT,      0, "system/odm/etc/fs_config_files" },
     { 00444, AID_ROOT,      AID_ROOT,      0, oem_conf_dir + 1 },
     { 00444, AID_ROOT,      AID_ROOT,      0, oem_conf_file + 1 },
-    { 00444, AID_ROOT,      AID_ROOT,      0, "system/oem/etc/fs_config_dirs" },
-    { 00444, AID_ROOT,      AID_ROOT,      0, "system/oem/etc/fs_config_files" },
     { 00750, AID_ROOT,      AID_SHELL,     0, "sbin/fs_mgr" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/bin/crash_dump32" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/bin/crash_dump64" },
@@ -163,10 +157,6 @@
     { 00555, AID_ROOT,      AID_ROOT,      0, "system/etc/ppp/*" },
     { 00555, AID_ROOT,      AID_ROOT,      0, "system/etc/rc.*" },
     { 00440, AID_ROOT,      AID_ROOT,      0, "system/etc/recovery.img" },
-    { 00600, AID_ROOT,      AID_ROOT,      0, "system/vendor/build.prop" },
-    { 00600, AID_ROOT,      AID_ROOT,      0, "system/vendor/default.prop" },
-    { 00444, AID_ROOT,      AID_ROOT,      0, "system/vendor/etc/fs_config_dirs" },
-    { 00444, AID_ROOT,      AID_ROOT,      0, "system/vendor/etc/fs_config_files" },
     { 00600, AID_ROOT,      AID_ROOT,      0, "vendor/build.prop" },
     { 00600, AID_ROOT,      AID_ROOT,      0, "vendor/default.prop" },
     { 00444, AID_ROOT,      AID_ROOT,      0, ven_conf_dir + 1 },
@@ -202,17 +192,11 @@
     // Support RT scheduling in Bluetooth
     { 00700, AID_BLUETOOTH, AID_BLUETOOTH, CAP_MASK_LONG(CAP_NET_ADMIN) |
                                            CAP_MASK_LONG(CAP_SYS_NICE),
-                                              "system/vendor/bin/hw/android.hardware.bluetooth@1.0-service" },
-    { 00700, AID_BLUETOOTH, AID_BLUETOOTH, CAP_MASK_LONG(CAP_NET_ADMIN) |
-                                           CAP_MASK_LONG(CAP_SYS_NICE),
                                               "vendor/bin/hw/android.hardware.bluetooth@1.0-service" },
 
     // Support wifi_hal_legacy administering a network interface.
     { 00755, AID_WIFI,      AID_WIFI,      CAP_MASK_LONG(CAP_NET_ADMIN) |
                                            CAP_MASK_LONG(CAP_NET_RAW),
-                                              "system/vendor/bin/hw/android.hardware.wifi@1.0-service" },
-    { 00755, AID_WIFI,      AID_WIFI,      CAP_MASK_LONG(CAP_NET_ADMIN) |
-                                           CAP_MASK_LONG(CAP_NET_RAW),
                                               "vendor/bin/hw/android.hardware.wifi@1.0-service" },
 
     // A non-privileged zygote that spawns isolated processes for web rendering.
@@ -233,8 +217,6 @@
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/bin/*" },
     { 00755, AID_ROOT,      AID_ROOT,      0, "system/lib/valgrind/*" },
     { 00755, AID_ROOT,      AID_ROOT,      0, "system/lib64/valgrind/*" },
-    { 00755, AID_ROOT,      AID_SHELL,     0, "system/vendor/bin/*" },
-    { 00755, AID_ROOT,      AID_SHELL,     0, "system/vendor/xbin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/xbin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "vendor/bin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "vendor/xbin/*" },
@@ -273,6 +255,36 @@
     return fd;
 }
 
+// if path is "vendor/<stuff>", "oem/<stuff>" or "odm/<stuff>"
+static bool is_partition(const char* path, size_t len) {
+    static const char* partitions[] = {"vendor/", "oem/", "odm/"};
+    for (size_t i = 0; i < (sizeof(partitions) / sizeof(partitions[0])); ++i) {
+        size_t plen = strlen(partitions[i]);
+        if (len <= plen) continue;
+        if (!strncmp(path, partitions[i], plen)) return true;
+    }
+    return false;
+}
+
+// alias prefixes of "<partition>/<stuff>" to "system/<partition>/<stuff>" or
+// "system/<partition>/<stuff>" to "<partition>/<stuff>"
+static bool prefix_cmp(const char* prefix, const char* path, size_t len) {
+    if (!strncmp(prefix, path, len)) return true;
+
+    static const char system[] = "system/";
+    if (!strncmp(path, system, strlen(system))) {
+        path += strlen(system);
+    } else if (len <= strlen(system)) {
+        return false;
+    } else if (strncmp(prefix, system, strlen(system))) {
+        return false;
+    } else {
+        prefix += strlen(system);
+        len -= strlen(system);
+    }
+    return is_partition(prefix, len) && !strncmp(prefix, path, len);
+}
+
 static bool fs_config_cmp(bool dir, const char* prefix, size_t len, const char* path, size_t plen) {
     if (dir) {
         if (plen < len) {
@@ -281,13 +293,13 @@
     } else {
         // If name ends in * then allow partial matches.
         if (prefix[len - 1] == '*') {
-            return !strncmp(prefix, path, len - 1);
+            return prefix_cmp(prefix, path, len - 1);
         }
         if (plen != len) {
             return false;
         }
     }
-    return !strncmp(prefix, path, len);
+    return prefix_cmp(prefix, path, len);
 }
 
 void fs_config(const char* path, int dir, const char* target_out_path, unsigned* uid, unsigned* gid,
diff --git a/libcutils/tests/fs_config.cpp b/libcutils/tests/fs_config.cpp
index 3917a0b..a62cd51 100644
--- a/libcutils/tests/fs_config.cpp
+++ b/libcutils/tests/fs_config.cpp
@@ -14,63 +14,188 @@
  * limitations under the License.
  */
 
+#include <inttypes.h>
+
 #include <string>
 
 #include <gtest/gtest.h>
 
+#include <android-base/file.h>
+#include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 
 #include <private/android_filesystem_config.h>
+#include <private/fs_config.h>
 
-extern const struct fs_path_config* __for_testing_only__android_dirs;
-extern const struct fs_path_config* __for_testing_only__android_files;
+extern const fs_path_config* __for_testing_only__android_dirs;
+extern const fs_path_config* __for_testing_only__android_files;
 
-static void check_one(const struct fs_path_config* paths, const std::string& prefix,
-                      const std::string& alternate) {
-    for (size_t idx = 0; paths[idx].prefix; ++idx) {
-        std::string path(paths[idx].prefix);
-        if (android::base::StartsWith(path, prefix.c_str())) {
-            path = alternate + path.substr(prefix.length());
-            size_t second;
-            for (second = 0; paths[second].prefix; ++second) {
-                if (path == paths[second].prefix) break;
+// Maximum entries in system/core/libcutils/fs_config.cpp:android_* before we
+// hit a nullptr termination, before we declare the list is just too big or
+// could be missing the nullptr.
+static constexpr size_t max_idx = 4096;
+
+static bool check_unique(std::vector<const char*>& paths, const std::string& config_name,
+                         const std::string& prefix) {
+    bool retval = false;
+
+    std::string alternate = "system/" + prefix;
+
+    for (size_t idx = 0; idx < paths.size(); ++idx) {
+        size_t second;
+        std::string path(paths[idx]);
+        // check if there are multiple identical paths
+        for (second = idx + 1; second < paths.size(); ++second) {
+            if (path == paths[second]) {
+                GTEST_LOG_(ERROR) << "duplicate paths in " << config_name << ": " << paths[idx];
+                retval = true;
+                break;
             }
-            if (!paths[second].prefix) {
-                // guaranteed to fail expectations, trigger test failure with
-                // a message that reports the violation as an inequality.
-                EXPECT_STREQ((prefix + path.substr(alternate.length())).c_str(), path.c_str());
+        }
+
+        // check if path is <partition>/
+        if (android::base::StartsWith(path, prefix.c_str())) {
+            // rebuild path to be system/<partition>/... to check for alias
+            path = alternate + path.substr(prefix.size());
+            for (second = 0; second < paths.size(); ++second) {
+                if (path == paths[second]) {
+                    GTEST_LOG_(ERROR) << "duplicate alias paths in " << config_name << ": "
+                                      << paths[idx] << " and " << paths[second]
+                                      << " (remove latter)";
+                    retval = true;
+                    break;
+                }
+            }
+            continue;
+        }
+
+        // check if path is system/<partition>/
+        if (android::base::StartsWith(path, alternate.c_str())) {
+            // rebuild path to be <partition>/... to check for alias
+            path = prefix + path.substr(alternate.size());
+            for (second = 0; second < paths.size(); ++second) {
+                if (path == paths[second]) break;
+            }
+            if (second >= paths.size()) {
+                GTEST_LOG_(ERROR) << "replace path in " << config_name << ": " << paths[idx]
+                                  << " with " << path;
+                retval = true;
             }
         }
     }
+    return retval;
 }
 
-static void check_two(const struct fs_path_config* paths, const std::string& prefix) {
+static bool check_unique(const fs_path_config* paths, const char* type_name,
+                         const std::string& prefix) {
+    std::string config("system/core/libcutils/fs_config.cpp:android_");
+    config += type_name;
+    config += "[]";
+
+    bool retval = false;
+    std::vector<const char*> paths_tmp;
+    for (size_t idx = 0; paths[idx].prefix; ++idx) {
+        if (idx > max_idx) {
+            GTEST_LOG_(WARNING) << config << ": has no end (missing null prefix)";
+            retval = true;
+            break;
+        }
+        paths_tmp.push_back(paths[idx].prefix);
+    }
+
+    return check_unique(paths_tmp, config, prefix) || retval;
+}
+
+#define endof(pointer, field) (offsetof(typeof(*(pointer)), field) + sizeof((pointer)->field))
+
+static bool check_unique(const std::string& config, const std::string& prefix) {
+    int retval = false;
+
+    std::string data;
+    if (!android::base::ReadFileToString(config, &data)) return retval;
+
+    const fs_path_config_from_file* pc =
+        reinterpret_cast<const fs_path_config_from_file*>(data.c_str());
+    size_t len = data.size();
+
+    std::vector<const char*> paths_tmp;
+    size_t entry_number = 0;
+    while (len > 0) {
+        uint16_t host_len = (len >= endof(pc, len)) ? pc->len : INT16_MAX;
+        if (host_len > len) {
+            GTEST_LOG_(WARNING) << config << ": truncated at entry " << entry_number << " ("
+                                << host_len << " > " << len << ")";
+            const std::string unknown("?");
+            GTEST_LOG_(WARNING)
+                << config << ": entry[" << entry_number << "]={ "
+                << "len=" << ((len >= endof(pc, len))
+                                  ? android::base::StringPrintf("%" PRIu16, pc->len)
+                                  : unknown)
+                << ", mode=" << ((len >= endof(pc, mode))
+                                     ? android::base::StringPrintf("0%" PRIo16, pc->mode)
+                                     : unknown)
+                << ", uid=" << ((len >= endof(pc, uid))
+                                    ? android::base::StringPrintf("%" PRIu16, pc->uid)
+                                    : unknown)
+                << ", gid=" << ((len >= endof(pc, gid))
+                                    ? android::base::StringPrintf("%" PRIu16, pc->gid)
+                                    : unknown)
+                << ", capabilities="
+                << ((len >= endof(pc, capabilities))
+                        ? android::base::StringPrintf("0x%" PRIx64, pc->capabilities)
+                        : unknown)
+                << ", prefix="
+                << ((len >= offsetof(fs_path_config_from_file, prefix))
+                        ? android::base::StringPrintf(
+                              "\"%.*s...", (int)(len - offsetof(fs_path_config_from_file, prefix)),
+                              pc->prefix)
+                        : unknown)
+                << " }";
+            retval = true;
+            break;
+        }
+        paths_tmp.push_back(pc->prefix);
+
+        pc = reinterpret_cast<const fs_path_config_from_file*>(reinterpret_cast<const char*>(pc) +
+                                                               host_len);
+        len -= host_len;
+        ++entry_number;
+    }
+
+    return check_unique(paths_tmp, config, prefix) || retval;
+}
+
+void check_two(const fs_path_config* paths, const char* type_name, const char* prefix) {
     ASSERT_FALSE(paths == nullptr);
-    std::string alternate = "system/" + prefix;
-    check_one(paths, prefix, alternate);
-    check_one(paths, alternate, prefix);
+    ASSERT_FALSE(type_name == nullptr);
+    ASSERT_FALSE(prefix == nullptr);
+    bool check_internal = check_unique(paths, type_name, prefix);
+    EXPECT_FALSE(check_internal);
+    bool check_overrides =
+        check_unique(std::string("/") + prefix + "etc/fs_config_" + type_name, prefix);
+    EXPECT_FALSE(check_overrides);
 }
 
 TEST(fs_config, vendor_dirs_alias) {
-    check_two(__for_testing_only__android_dirs, "vendor/");
+    check_two(__for_testing_only__android_dirs, "dirs", "vendor/");
 }
 
 TEST(fs_config, vendor_files_alias) {
-    check_two(__for_testing_only__android_files, "vendor/");
+    check_two(__for_testing_only__android_files, "files", "vendor/");
 }
 
 TEST(fs_config, oem_dirs_alias) {
-    check_two(__for_testing_only__android_dirs, "oem/");
+    check_two(__for_testing_only__android_dirs, "dirs", "oem/");
 }
 
 TEST(fs_config, oem_files_alias) {
-    check_two(__for_testing_only__android_files, "oem/");
+    check_two(__for_testing_only__android_files, "files", "oem/");
 }
 
 TEST(fs_config, odm_dirs_alias) {
-    check_two(__for_testing_only__android_dirs, "odm/");
+    check_two(__for_testing_only__android_dirs, "dirs", "odm/");
 }
 
 TEST(fs_config, odm_files_alias) {
-    check_two(__for_testing_only__android_files, "odm/");
+    check_two(__for_testing_only__android_files, "files", "odm/");
 }